# Relationship history for MSHA mine 3302937

Current hierarchy: **Charles C  Ungurean → CCU Coal and Construction LLC → CCU Bellaire Dock**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Shell Oil Company → CCU Bellaire Dock; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Charles C  Ungurean → CCU Bellaire Dock; 1950-01-01 to 2014-12-31; source msha-controller-operator-history
- **operator_operates_mine:** R & F Coal Company → CCU Bellaire Dock; 1973-01-01 to 1992-11-15; source msha-controller-operator-history
- **controller_controls_operator:** Shell Oil Company → R & F Coal Company; 1973-01-01 to 1992-11-15; source msha-controller-operator-history
- **operator_operates_mine:** R & F Coal Company → CCU Bellaire Dock; 1992-11-16 to 1998-09-01; source msha-controller-operator-history
- **controller_controls_mine:** Zeigler Coal Holding Company → CCU Bellaire Dock; 1992-11-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Zeigler Coal Holding Company → R & F Coal Company; 1992-11-16 to 1998-09-01; source msha-controller-operator-history
- **operator_operates_mine:** R & F Coal Company → CCU Bellaire Dock; 1998-09-02 to 1999-12-28; source msha-controller-operator-history
- **controller_controls_mine:** Horizon Natural Resources Incorporated → CCU Bellaire Dock; 1998-09-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Horizon Natural Resources Incorporated → R & F Coal Company; 1998-09-02 to 1999-12-28; source msha-controller-operator-history
- **operator_operates_mine:** Capstone Holding Company Inc → CCU Bellaire Dock; 1999-12-29 to 2002-02-03; source msha-controller-operator-history
- **controller_controls_mine:** John  Dutton → CCU Bellaire Dock; 1999-12-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John  Dutton → Capstone Holding Company Inc; 1999-12-29 to 2002-02-03; source msha-controller-operator-history
- **operator_operates_mine:** Oxford Mining Co LLC → CCU Bellaire Dock; 2002-02-04 to 2019-02-10; source msha-controller-operator-history
- **controller_controls_operator:** Charles C  Ungurean → Oxford Mining Co LLC; 2002-02-04 to 2014-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Westmoreland Coal Company → CCU Bellaire Dock; 2015-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Westmoreland Coal Company → Oxford Mining Co LLC; 2015-01-01 to 2019-02-10; source msha-controller-operator-history
- **operator_operates_mine:** CCU Coal and Construction LLC → CCU Bellaire Dock; 2019-02-11 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Charles C  Ungurean → CCU Bellaire Dock; 2019-02-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Charles C  Ungurean → CCU Coal and Construction LLC; 2019-02-11 to current/open; source msha-controller-operator-history